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02-07-2018, 08:51 PM
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#41
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Senior Member
Join Date: Feb 2016
Location: Abilene
Posts: 579
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Reckon what the ampacity of baling wire is?
Back in the day, we had a circuit that tripped the breakers almost daily.
Right around 4:00 pm. We had countless man hours patrolling that line.
Turned out, once "Dennis the Menace" got off the bus from school, he'd grab a longish strand of baling wire and heave it over the power line.
Upstream breaker was a 60 amp. Vacuum type.
Point being, if a 10ga copper cable "cooks" behind a 50 amp breaker.
That's a bad breaker.
A direct short (phase to phase or phase to ground) will trip a breaker way beyond the capacity rating of the shorted conductor.
Voltage not being a factor.
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02-08-2018, 04:04 AM
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#42
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Lost in the Woods
Join Date: Feb 2017
Location: Cocoa
Posts: 115
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Ok, so I'm man enough to man-up here. Thanks for all your comments, and I apologize for getting everyone triggered here. Our experiences obviously differ. I have enough strife without creating it on a forum.
We never go to "campgrounds" we do rodeo. Many of the rodeo grounds have GFCI's (like Eaton and Bender) just like they use at marinas for shore power, because we're always in mud and water. If your cord gets cut, the GFCI trips in 200 milliseconds or less. Your experience at campgrounds obviously differs, after seeing all the comments, but I just have to trust you on that.
I stand down.
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02-08-2018, 07:30 AM
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#43
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Senior Member
Join Date: Jun 2016
Location: Mechanicsville
Posts: 1,479
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Would a Progressive Industries EMI device plugged in between the 50 to 30 amp dog bone and the power cord for the RV come in handy here. Would it protect the cord and every thing down stream from the PI EMI?
Quote:
Originally Posted by wags999
The confusion comes in because he believes your RV breaker is protecting the cord. I'ts not, it's protecting everything AFTER it enters your RV breaker.
The pedestal breaker most likely is connected to a 60 amp breaker at the campground main box. Camp sites are typically daisy chain wired...meaning every other campsite is wired together. Each main at the campground main box controls two camp sites (for that amp receptacle). What the means, is, when your working on the breaker you have 60 amps of power available, not 30 that is the breaker size.
The thing to remember is, whatever you plug into, that is what your cord can POTENTIALLY carry, until the next breaker is hit, then after that breaker it is protecting the system.
When plugged into a 50 amp receptacle with a 30 amp RV cord you would be using one of the legs in that 50 amp receptacle, thus, exposing your cord to 50 amps at 120 volts. IF your cord shorts ahead of the RV breaker it COULD pull the full 50 amps of power before the pedestal breaker would trip...the RV breaker may never trip in this example.
Best policy is to always plug into the appropriate receptacle when it's safe. You gain nothing in power by plugging into a higher amperage receptacle. IF, the 30 amp receptacle is damaged then, I would use a dog bone to connect to the 50 amp receptacle. BUT I would also IMMEDIATELY notify the campground and hopefully they would rectify the problem so you can use the appropriate receptacle.
Happy Camping
thank you nwminnesota for corroborating what I said.
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__________________
Erroll and Mary Doss and Duffy (RIP)
2018 Jayco Redhawk 22J
2014 F150 SC, 4x4, HD Pkg, Sterling Gray
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02-08-2018, 11:22 AM
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#44
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Senior Member
Join Date: Oct 2014
Location: Surprise, Arizona
Posts: 464
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Quote:
Originally Posted by ROC-REQS
It won't make a different.
50A shore power provides power via 2 legs.
30A shore power provides power via only 1 leg.
A 50A to 30A dog bone only used 1 leg of the 2 50A legs.
So, if you connect directly to the 30A shore power or connect to the 50A shore power using a 50A to 30A dog bone, your provably getting power off the same leg.
I'm curious on why the electrician said you wouldn't get a full 30A.
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DITTO ! I have 50 amp in wall with a 30 amp reducer. And, ALWAYS use a surge protector at home or on the road !
__________________
2015 GrayHawk 29MV/ Toad - 2018 Equinox (automatic)
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Any man can treat a lady right for one night, but it takes a great man to treat her right for the rest of her life.
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02-08-2018, 12:13 PM
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#45
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Senior Member
Join Date: Jan 2015
Location: Surprise
Posts: 2,623
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Quote:
Originally Posted by Atlee
Would a Progressive Industries EMI device plugged in between the 50 to 30 amp dog bone and the power cord for the RV come in handy here. Would it protect the cord and every thing down stream from the PI EMI?
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short answer yes...if you plug a 30 amp EMS into the 50 amp receptacle then it should be protected as the power would be cut off at the pedestal. I'm not sure if the EMS would shut power off at 30 amps or not..need to look into that since in a normal installation the breaker would shut your power off in an over amperage situation rather than the EMS shutting an over amperage situation. The EMS would shut off in an over / under voltage and the other issues...open neutral etc.
Thinking about it, I doubt it would protect for an over amperage situation where you plug into a 50 amp breaker with a 30 amp EMS. Since the EMS does not operate as a standard breaker.
Perhaps others will chime in...
__________________
2011 Toyota Tundra double cab
2015 27RLS
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02-08-2018, 12:30 PM
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#46
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Senior Member
Join Date: Dec 2014
Location: Akron
Posts: 3,209
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I don't believe an EMS acts as a circuit breaker, couldn't find any overload opening specs for my hardwired 50-amp unit. Did not check specs on a portable.
__________________
Rob R.
Akron, OH
2014 Seneca 37TS
Toads: 2019 Ford Edge ST or 2013 Ford Focus ST
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02-08-2018, 08:03 PM
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#47
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Senior Member
Join Date: Apr 2016
Location: Fortuna Foothills
Posts: 1,863
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An EMS is not an over current device. And to the surprise of some neither is a GFCI.
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02-08-2018, 08:21 PM
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#48
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Senior Member
Join Date: Jun 2016
Location: Mechanicsville
Posts: 1,479
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So an over current condition is different from a current spike?
Quote:
Originally Posted by Vicr
An EMS is not an over current device. And to the surprise of some neither is a GFCI.
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__________________
Erroll and Mary Doss and Duffy (RIP)
2018 Jayco Redhawk 22J
2014 F150 SC, 4x4, HD Pkg, Sterling Gray
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02-08-2018, 09:58 PM
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#49
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Senior Member
Join Date: Jan 2015
Location: Surprise
Posts: 2,623
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Quote:
Originally Posted by Atlee
So an over current condition is different from a current spike?
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Yes, over current means pulling amps, surge is extreme high voltage. It would equate to extreme high pressure in a water pipe.
__________________
2011 Toyota Tundra double cab
2015 27RLS
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